-/**
- * 选择列表插件
- * varstion 2.0.0
- * by Houfeng
- * Houfeng@DCloud.io
- */
-
-(function($, window, document, undefined) {
-
-	var MAX_EXCEED = 30;
-	var VISIBLE_RANGE = 90;
-	var DEFAULT_ITEM_HEIGHT = 40;
-	var BLUR_WIDTH = 10;
-
-	var rad2deg = $.rad2deg = function(rad) {
-		return rad / (Math.PI / 180);
-	};
-
-	var deg2rad = $.deg2rad = function(deg) {
-		return deg * (Math.PI / 180);
-	};
-
-	var platform = navigator.platform.toLowerCase();
-	var userAgent = navigator.userAgent.toLowerCase();
-	var isIos = (userAgent.indexOf('iphone') > -1 ||
-			userAgent.indexOf('ipad') > -1 ||
-			userAgent.indexOf('ipod') > -1) &&
-		(platform.indexOf('iphone') > -1 ||
-			platform.indexOf('ipad') > -1 ||
-			platform.indexOf('ipod') > -1);
-	//alert(isIos);
-
-	var Picker = $.Picker = function(holder, options) {
-		var self = this;
-		self.holder = holder;
-		self.options = options || {};
-		self.init();
-		self.initInertiaParams();
-		self.calcElementItemPostion(true);
-		self.bindEvent();
-	};
-
-	Picker.prototype.findElementItems = function() {
-		var self = this;
-		self.elementItems = [].slice.call(self.holder.querySelectorAll('li'));
-		return self.elementItems;
-	};
-
-	Picker.prototype.init = function() {
-		var self = this;
-		self.list = self.holder.querySelector('ul');
-		self.findElementItems();
-		self.height = self.holder.offsetHeight;
-		self.r = self.height / 2 - BLUR_WIDTH;
-		self.d = self.r * 2;
-		self.itemHeight = self.elementItems.length > 0 ? self.elementItems[0].offsetHeight : DEFAULT_ITEM_HEIGHT;
-		self.itemAngle = parseInt(self.calcAngle(self.itemHeight * 0.8));
-		self.hightlightRange = self.itemAngle / 2;
-		self.visibleRange = VISIBLE_RANGE;
-		self.beginAngle = 0;
-		self.beginExceed = self.beginAngle - MAX_EXCEED;
-		self.list.angle = self.beginAngle;
-		if (isIos) {
-			self.list.style.webkitTransformOrigin = "center center " + self.r + "px";
-		}
-	};
-
-	Picker.prototype.calcElementItemPostion = function(andGenerateItms) {
-		var self = this;
-		if (andGenerateItms) {
-			self.items = [];
-		}
-		self.elementItems.forEach(function(item) {
-			var index = self.elementItems.indexOf(item);
-			self.endAngle = self.itemAngle * index;
-			item.angle = self.endAngle;
-			item.style.webkitTransformOrigin = "center center -" + self.r + "px";
-			item.style.webkitTransform = "translateZ(" + self.r + "px) rotateX(" + (-self.endAngle) + "deg)";
-			if (andGenerateItms) {
-				var dataItem = {};
-				dataItem.text = item.innerHTML || '';
-				dataItem.value = item.getAttribute('data-value') || dataItem.text;
-				self.items.push(dataItem);
-			}
-		});
-		self.endExceed = self.endAngle + MAX_EXCEED;
-		self.calcElementItemVisibility(self.beginAngle);
-	};
-
-	Picker.prototype.calcAngle = function(c) {
-		var self = this;
-		var a = b = parseFloat(self.r);
-		//直径的整倍数部分直接乘以 180
-		c = Math.abs(c); //只算角度不关心正否值
-		var intDeg = parseInt(c / self.d) * 180;
-		c = c % self.d;
-		//余弦
-		var cosC = (a * a + b * b - c * c) / (2 * a * b);
-		var angleC = intDeg + rad2deg(Math.acos(cosC));
-		return angleC;
-	};
-
-	Picker.prototype.calcElementItemVisibility = function(angle) {
-		var self = this;
-		self.elementItems.forEach(function(item) {
-			var difference = Math.abs(item.angle - angle);
-			if (difference < self.hightlightRange) {
-				item.classList.add('highlight');
-			} else if (difference < self.visibleRange) {
-				item.classList.add('visible');
-				item.classList.remove('highlight');
-			} else {
-				item.classList.remove('highlight');
-				item.classList.remove('visible');
-			}
-		});
-	};
-
-	Picker.prototype.setAngle = function(angle) {
-		var self = this;
-		self.list.angle = angle;
-		self.list.style.webkitTransform = "perspective(1000px) rotateY(0deg) rotateX(" + angle + "deg)";
-		self.calcElementItemVisibility(angle);
-	};
-
-	Picker.prototype.bindEvent = function() {
-		var self = this;
-		var lastAngle = 0;
-		var startY = null;
-		self.holder.addEventListener('touchstart', function(event) {
-			event.preventDefault();
-			self.list.style.webkitTransition = '';
-			startY = (event.changedTouches ? event.changedTouches[0] : event).pageY;
-			lastAngle = self.list.angle;
-			self.updateInertiaParams(event, true);
-		}, false);
-		self.holder.addEventListener('touchend', function(event) {
-			event.preventDefault();
-			self.startInertiaScroll(event);
-		}, false);
-		self.holder.addEventListener('touchcancel', function(event) {
-			event.preventDefault();
-			self.startInertiaScroll(event);
-		}, false);
-		self.holder.addEventListener('touchmove', function(event) {
-			event.preventDefault();
-			var endY = (event.changedTouches ? event.changedTouches[0] : event).pageY;
-			var dragRange = endY - startY;
-			var dragAngle = self.calcAngle(dragRange);
-			var newAngle = dragRange > 0 ? lastAngle - dragAngle : lastAngle + dragAngle;
-			if (newAngle > self.endExceed) {
-				newAngle = self.endExceed
-			}
-			if (newAngle < self.beginExceed) {
-				newAngle = self.beginExceed
-			}
-			self.setAngle(newAngle);
-			self.updateInertiaParams(event);
-		}, false);
-		//--
-		self.list.addEventListener('tap', function(event) {
-			elementItem = event.target;
-			if (elementItem.tagName == 'LI') {
-				self.setSelectedIndex(self.elementItems.indexOf(elementItem), 200);
-			}
-		}, false);
-	};
-
-	Picker.prototype.initInertiaParams = function() {
-		var self = this;
-		self.lastMoveTime = 0;
-		self.lastMoveStart = 0;
-		self.stopInertiaMove = false;
-	};
-
-	Picker.prototype.updateInertiaParams = function(event, isStart) {
-		var self = this;
-		var point = event.changedTouches ? event.changedTouches[0] : event;
-		if (isStart) {
-			self.lastMoveStart = point.pageY;
-			self.lastMoveTime = event.timeStamp || Date.now();
-			self.startAngle = self.list.angle;
-		} else {
-			var nowTime = event.timeStamp || Date.now();
-			if (nowTime - self.lastMoveTime > 300) {
-				self.lastMoveTime = nowTime;
-				self.lastMoveStart = point.pageY;
-			}
-		}
-		self.stopInertiaMove = true;
-	};
-
-	Picker.prototype.startInertiaScroll = function(event) {
-		var self = this;
-		var point = event.changedTouches ? event.changedTouches[0] : event;
-		/** 
-		 * 缓动代码
-		 */
-		var nowTime = event.timeStamp || Date.now();
-		var v = (point.pageY - self.lastMoveStart) / (nowTime - self.lastMoveTime); //最后一段时间手指划动速度  
-		var dir = v > 0 ? -1 : 1; //加速度方向  
-		var deceleration = dir * 0.0006 * -1;
-		var duration = Math.abs(v / deceleration); // 速度消减至0所需时间  
-		var dist = v * duration / 2; //最终移动多少 
-		var startAngle = self.list.angle;
-		var distAngle = self.calcAngle(dist) * dir;
-		//----
-		var srcDistAngle = distAngle;
-		if (startAngle + distAngle < self.beginExceed) {
-			distAngle = self.beginExceed - startAngle;
-			duration = duration * (distAngle / srcDistAngle) * 0.6;
-		}
-		if (startAngle + distAngle > self.endExceed) {
-			distAngle = self.endExceed - startAngle;
-			duration = duration * (distAngle / srcDistAngle) * 0.6;
-		}
-		//----
-		if (distAngle == 0) {
-			self.endScroll();
-			return;
-		}
-		self.scrollDistAngle(nowTime, startAngle, distAngle, duration);
-	};
-
-	Picker.prototype.scrollDistAngle = function(nowTime, startAngle, distAngle, duration) {
-		var self = this;
-		self.stopInertiaMove = false;
-		(function(nowTime, startAngle, distAngle, duration) {
-			var frameInterval = 13;
-			var stepCount = duration / frameInterval;
-			var stepIndex = 0;
-			(function inertiaMove() {
-				if (self.stopInertiaMove) return;
-				var newAngle = self.quartEaseOut(stepIndex, startAngle, distAngle, stepCount);
-				self.setAngle(newAngle);
-				stepIndex++;
-				if (stepIndex > stepCount - 1 || newAngle < self.beginExceed || newAngle > self.endExceed) {
-					self.endScroll();
-					return;
-				}
-				setTimeout(inertiaMove, frameInterval);
-			})();
-		})(nowTime, startAngle, distAngle, duration);
-	};
-
-	Picker.prototype.quartEaseOut = function(t, b, c, d) {
-		return -c * ((t = t / d - 1) * t * t * t - 1) + b;
-	};
-
-	Picker.prototype.endScroll = function() {
-		var self = this;
-		if (self.list.angle < self.beginAngle) {
-			self.list.style.webkitTransition = "150ms ease-out";
-			self.setAngle(self.beginAngle);
-		} else if (self.list.angle > self.endAngle) {
-			self.list.style.webkitTransition = "150ms ease-out";
-			self.setAngle(self.endAngle);
-		} else {
-			var index = parseInt((self.list.angle / self.itemAngle).toFixed(0));
-			self.list.style.webkitTransition = "100ms ease-out";
-			self.setAngle(self.itemAngle * index);
-		}
-		self.triggerChange();
-	};
-
-	Picker.prototype.triggerChange = function(force) {
-		var self = this;
-		setTimeout(function() {
-			var index = self.getSelectedIndex();
-			var item = self.items[index];
-			if ($.trigger && (index != self.lastIndex || force)) {
-				$.trigger(self.holder, 'change', {
-					"index": index,
-					"item": item
-				});
-				//console.log('change:' + index);
-			}
-			self.lastIndex = index;
-		}, 0);
-	};
-
-	Picker.prototype.correctAngle = function(angle) {
-		var self = this;
-		if (angle < self.beginAngle) {
-			return self.beginAngle;
-		} else if (angle > self.endAngle) {
-			return self.endAngle;
-		} else {
-			return angle;
-		}
-	};
-
-	Picker.prototype.setItems = function(items) {
-		var self = this;
-		self.items = items || [];
-		var buffer = [];
-		self.items.forEach(function(item) {
-			if (item !== null && item !== undefined) {
-				buffer.push('<li>' + (item.text || item) + '</li>');
-			}
-		});
-		self.list.innerHTML = buffer.join('');
-		self.findElementItems();
-		self.calcElementItemPostion();
-		self.setAngle(self.correctAngle(self.list.angle));
-		self.triggerChange(true);
-	};
-
-	Picker.prototype.getItems = function() {
-		var self = this;
-		return self.items;
-	};
-
-	Picker.prototype.getSelectedIndex = function() {
-		var self = this;
-		return parseInt((self.list.angle / self.itemAngle).toFixed(0));
-	};
-
-	Picker.prototype.setSelectedIndex = function(index, duration) {
-		var self = this;
-		self.list.style.webkitTransition = '';
-		var angle = self.correctAngle(self.itemAngle * index);
-		if (duration && duration > 0) {
-			var distAngle = angle - self.list.angle;
-			self.scrollDistAngle(Date.now(), self.list.angle, distAngle, duration);
-		} else {
-			self.setAngle(angle);
-		}
-		self.triggerChange();
-	};
-
-	Picker.prototype.getSelectedItem = function() {
-		var self = this;
-		return self.items[self.getSelectedIndex()];
-	};
-
-	Picker.prototype.getSelectedValue = function() {
-		var self = this;
-		return (self.items[self.getSelectedIndex()] || {}).value;
-	};
-
-	Picker.prototype.getSelectedText = function() {
-		var self = this;
-		return (self.items[self.getSelectedIndex()] || {}).text;
-	};
-
-	Picker.prototype.setSelectedValue = function(value, duration) {
-		var self = this;
-		for (var index in self.items) {
-			var item = self.items[index];
-			if (item.value == value) {
-				self.setSelectedIndex(index, duration);
-				return;
-			}
-		}
-	};
-
-	if ($.fn) {
-		$.fn.picker = function(options) {
-			//遍历选择的元素
-			this.each(function(i, element) {
-				if (element.picker) return;
-				if (options) {
-					element.picker = new Picker(element, options);
-				} else {
-					var optionsText = element.getAttribute('data-picker-options');
-					var _options = optionsText ? JSON.parse(optionsText) : {};
-					element.picker = new Picker(element, _options);
-				}
-			});
-			return this[0] ? this[0].picker : null;
-		};
-
-		//自动初始化
-		$.ready(function() {
-			$('.mui-picker').picker();
-		});
-	}
-
-})(window.mui || window, window, document, undefined);
-//end 